An object of the present invention automatically report and urination detection of diaper wearer can , to provide urination detection system together can reduce the discomfort of caregiver burden and non- caregivers . A diaper wearer and is attached to the diaper to wear and a urine detection portion 33 having a predetermined impedance in the normal state , the urine sensor 3 using an IC tag that stores the personal information in the electromagnetic induction type passive type , is attached to the bed sheets of diaper wearer , a film-like antenna 6 for electromagnetic induction coupling and urine sensor 3 , urination monitoring , including the personal information of a diaper wearer , and data delivery to the mobile information terminal care , etc. possessed the conduct and management computer , the required power supply to the film-like antenna 6 for transmission and reception controller for performing a film-like antenna and urine sensor causes the electromagnetic induction coupling , data transmission in a wireless or wired between the management computer and a 7 to perform a notification and urination detection by utilizing the impedance change of the urine detection part due to the presence of urine W. [ Selection Figure Figure 5【課題】自動的におむつ装用者の排尿検知と通報ができ、介護者の負担と非介護者の不快感を共に軽減できる排尿検知システムを提供する。【解決手段】おむつ装用者が装用するおむつに取り付けるとともに通常状態で所定のインピーダンスを持った尿検知部33を備え、電磁誘導型パッシブタイプで個人情報を記憶したICタグを用いた尿センサ3と、おむつ装用者のベッドシーツに取り付けるとともに、尿センサ3と電磁誘導結合するフィルム状アンテナ6と、おむつ装用者の個人情報を含む排尿監視、及び介護者等が所持する携帯情報端末へのデータ配信を行う管理コンピュータと、フィルム状アンテナ6への所要の電力供給を行い、フィルム状アンテナと尿センサとを電磁誘導結合させるとともに、管理コンピュータとの間で無線又は有線でのデータ伝送を行う送受信コントローラー7とを含み、尿Wの存在による尿検知部のインピーダンス変化を利用して排尿検知と通報を行う。【選択図】図5